PostgreSQL: Case insensitive string comparison

Question

Is there a simple ignore-case-comparison for PostgreSQL?

I want to replace:

SELECT id, user_name 
    FROM users 
        WHERE lower(email) IN (lowe         


        

Answer 1

Use ‘Collate SQL_Latin1_General_CP1_CS_AS’ for it.
declare @a nvarchar(5)='a'
declare @b nvarchar(5)='A'

if(@a=@b Collate SQL_Latin1_General_CP1_CS_AS)
begin
print 'Match'
end
else
begin
print 'Not Matched'
end